Rotary pump for use in pumping wood-pulp and similar substances.



J. R. KINNBY. ROTARY PUMP FOR USE IN PUMPING WOOD PULP AND SIMILAR SUBSTANCES. APPLICATION FILED SEPT. 26, I910.

1;001,533. Patented Aug.22, 1911.

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J. R. KINNEY.

ROTARY PUMP FOR USE IN PUMPING WOOD PULP AND SIMILAR SUBSTANCES.

APPLIOATION TILED SEPT. 26, 1910.

Patented Aug. 22, 1911.

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d/zm 4% W 'Nrrn sa'ras J'U'STUS R. KINNEY, 0F BOSTON, MASSACHUSETTS.

ROTARY PUMP FOR USE IN PUMPING WOOD-PULP AND SIMILAR SUBSTANCES.

Specification of Letters Patent.

Application filed September 26, 1910. Serial No. 583,954.

Patented Aug. 22, 1911.

To all whom it may concern:

Be it known that I, JUsTUs R. KINNEY, a citizen of the United States of America, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Rotary Pumps for Use in Pumping Wood-Pulp and Similar Substances, of which the following is a specification.

This invention relates to rotary pumps and has for its object the operation of a pump that is particularly adapted for use in pumping wood pulp and similar heavy substances.

The invention consists of certain novel features of construction and arrangement of parts which will be readily understood by reference to the description of the drawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents a vertical section of the pump embodying features of the present invention, and Fig. 2

represents a longitudinal vertical section of the same, the cutting plane being on line 2, 2 on Fig. 1. 7

Similar characters designate like parts throughout the several figures of the drawings.

In the drawings, 10 represents the casing of a pum provided with a cylindrical piston cham r 11, in which is centrally positioned a revoluble shaft 12, upon which is eccentrically mounted a cylindrical piston 13. This piston 13 is provided,-in that portion of its periphery farthest removed from the axis of the shaft 12, with a" packing member 14 of usual construction, which is continuously in contact with the inlet wall of the piston chamber 11, and effectually prevents any leakage of material between the inner wall of said chamber and said piston 13. The casing 10 is provided with an inlet chamber 15 communicating with the piston chamber 11 and pivoted therein, at 16, is a blade 17 having pivotally mounted thereon the shoe 18 contacting wlth the periphery of the piston 13 and effectually preventing the passage of any material from the inlet chamber 15 to" the outlet chamber 19 except as it is forced through the piston chamber 11 by means of the piston 13. The shoe is provided with a recess 20 in its contacting face on the outlet side of its pivot and this recess 20 has extending therefrom and through said shoe the openings 21. By this construction the sh e is provided with sufiicient contacting surface against the periphery of the piston 13, on either side of its pivot, but it is apparent that there is an excess of pressure on the inlet side of said shoe, which retains this edge of the shoe 18 in firm contact with the periphery of the piston 13, and thereby effectually prevents the admission of any material between the shoe and the periphery of said piston.

Usually in pumps of this description two pistons 13 are used which pistons are oppositely disposed as indicated in Fig. 2 of the drawings, both of the pistons being mounted on the same shaft 12 and keyed thereto, and each piston is provided with its own pivoted blade 17. Above these blades 17 is mounted a slotted member 22 which is slidable in vertical guide grooves- 23 formed in the casing 10. This slotted member 22 may be adjusted in said grooves 23 by means of the adjusting screws 24: hearing upon either end thereof and locked in this adjusted position by the locknuts 25. In the slot of the member 22 is pivoted at 26 a rocker member 27, each end of which is provided with a semi-cylindrical socket 28 adapted to receive an enlarged ball end 29, of a strut 30 the opposite end of which is rounded and rests in a socket 31 formed in the upper face of each blade 17. It 1s obvious that by this construction, as one blade 17 is being forced upwardly by the rotation of its piston 13, through the o eration of the rocker member 27 the other lade 17 is being forced downwardly to retain the shoe 18 in firm contact with its respective piston 13. The member 22 forms a rigid support for the rocker member 27 and provides means for adjusting the position of the rocker member to a nicety.

Difficulty has heretofore been found to exist where struts are used between the rocker member 27 and the'pivoted blades 17 by said struts occasionally becoming displaced from their sockets and becoming entangled with the various operating parts of the pump to their manifest injury. For this reason it has been found desirable to provide some means for preventing such displacement. This is readily done by making a strut with an enlarged ball end 29 as is indicated in the drawings, and passing the reduced end through an opening 32 in the plate 33 secured to the end face of the rocker member 27. The opening 32 is of sutficient size to permit some play to the strut 30 but is small enough to prevent the ball end 29 from passing through. Normally, when the pump is in operation, the rounded ends of the struts 30 are resting in the sockets 28 and 31, and do not contact with the walls of the openings 32, but whenever, from any cause there is any tendency for the struts to become di placed from the sockets 28 and 31, they will be prevented from such displacement by means of said plates.

The pivots 16 for the blades 17 rest ina semi-annular bushing 34 positioned within the central bracket 35 and depressions 36 in the side frame of the casing 10, said bushing being keyed to said bearing 35 by means of member 37. The'piston 13 is provided with an opening 38 therethrough extending from one end to the other, and each end of said piston is concaved to form a shallow chamber 39 therein communicating with said p1ssages'38. From the passage 38 to the periphery of said piston 13 are open-,

ings 40, these openings being in the rear of the packing 1.4 as the piston revolves. Theobject of these concaved recesses 39, the passage 38 and the openings 40 is to take care of such portions of the heavy substances being pumped as may work between the ends of the piston 13 and the end plates 41.

Heretofore, when the'ends of the pistons were provided with packing members bearing against the end plates 41, and the pump was being used to pump such material as wood pulp, this material would sometimes get between the end plates and the ends of the pistons and clog up so as to prevent the proper operation of the pump. To obviate this when the pump is being used for such heavy substances, it is found 'desirable to provide the recesses 39, which will cause any material which gets between the pistons and the end plate to be forced during the rotation of the piston into the passages 38, and then through the openings 40 into the piston chamber, thus providinga means for readily disposing of this material without affecting the proper operation of the pump.

It is believed that the operation and many advantages of a device of this construction will be readily understood without any further description.

2. In a device of the class described the combination of two oppositely-disposed rotaiy eccentric pistons; a pivoted blade for each piston; a rocker member; struts the ends of which are rounded and rest in sockets in said blades and member; a slotted frame in the slot of which said rocker member is pivoted; and means for adjusting said frame relative to said pistons.

3. In a device of the class described, the

combination of an eccentric piston, a pivoted blade therefor; and a shoe pivoted to said blade and having a solid piston contacting portion on one side of-its pivot and'an open frame-work on the opposite side thereof adapted to bear upon said piston.

4. In a device of the class described, the combination of an eccentric piston; a pivoted blade therefor; and a shoe pivoted thereto having a piston bearing surface on each side of its pivot, a recess in the bearing surface on one side of said pivot, and an opening through the shoe communicating with said recess.

'5. In a device of the class described, the combination of a revoluble shaft; an eccentric piston thereon; having concaved recesses in the ends thereof; a pivoted blade therefor; a packing member in that portion of the periphery of said piston farthest removed from the axis of said shaft; and an opening extending through said piston, communicating with the piston chamber by passages located in the rear of said packing member. 7

Signed by me at a Post Office Sq'., Boston,

Mass. this 21st day of September, 1910.

JUSTUS R. KINNEY. Witnesses:

WALTER E. LOMBARD, NATHAN C. LOMBARD. 

